磁浮直线电机的级并联组不对称补偿控制  

Unsympathetic Disturbance Compensation for Cascaded Single-sided Linear Induction Motors

作　　者：邓江明[1] 陈特放[2] 

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114 [2]中南大学信息科学与工程学院,长沙410075

出　　处：《控制工程》2015年第4期679-682,共4页Control Engineering of China

基　　金：国家自然科学基金项目(61273158);教育部博士学术新人奖(114601034)

摘　　要：单边直线感应电机在工业应用中常采用级联的方式整体运行,以便获得较大的输出力来满足牵引伺服要求。单个电机单元从推力输出的角度上看可认为是独立的,具备水平和垂向运动的自由度。由于磁浮气隙的波动等价为电机气隙的波动,导致各单元输出推力不统一。通过建立最大推力输出的电流控制模型,将级联电机组的参数偏差和动态参数波动等价为非线性不匹配扰动,通过引入非线性滑模观测器对该扰动进行辨识,然后将辨识扰动在逆变器控制输出时加以控制补偿,这样使得级联组输出推力保持一致且具有优良的抗扰动性。Compared to the situation that a single of single-sided linear induction motors （SLIMs） works, cascaded SLIMs can entirely generate larger thrust. Since a single SLIM can be treated as an individual vibration cell, the output thrust force generated by one SLIM is quite different from others due to the differences between their statistical or dynamical parameters. To deal with this unsympathetic problem, a current compensation strategy based on disturbance observer is proposed in this paper. Firstly, maximum thrust output mathematical model based on constant optimum slip-frequency point is analyzed. Secondly, a nonlinear mismatched disturbance observer （NMDOB） is adopted for current compensation control to attenuate undesired second-order thrust disturbance. The effectiveness of the proposed algorithm is verified by experimental results.

关 键 词：单边直线感应电机 级联拓扑 非线性控制 扰动观测器 

分 类 号：TM359[电气工程—电机]